Photographic material stabilised against ultraviolet radiation

ABSTRACT

This invention relates to colour photographic material. Said material is stabilized by means of a 2-hydroxybenzophenone which is free from sulphonic acid groups and which corresponds to the formula WHEREIN X represents a hydrogen or halogen atom, a possibly substituted alkyl, alkenyl or phenyl group, an alkylcarbonyl or alkylsulfonyl group or an A&#39;&#39;-O group, Y represents a hydrogen or halogen atom, a possibly substituted alkyl group or an A&#39;&#39;&#39;&#39;-O group, A, A&#39;&#39; and A&#39;&#39;&#39;&#39; each representing a hydrogen atom, a possibly substituted alkyl, alkenyl, cycloalkyl, aralkyl or phenyl group or a residue of the formula

United States Patent [1 1 Piller et a1.

[ 1 Jan. 15, 1974 1 PHOTOGRAPHIC MATERIAL STABILISED AGAINST ULTRAVIOLET RADIATION [73] Assigneez Ciba-Geigy AG, Basil, Switzerland [22] Filed: Mar. 10, 1971 [21] Appl. No.: 123,018

[30] Foreign Application Priority Data Mar. 11, 1970 Switzerland 3643/70 [52] U.S. Cl. 96/84 R, 252/300 [51] Int. Cl G03c 1/84 [58] Field of Search 96/84; 252/300 [56] References Cited UNITED STATES PATENTS 2,568,894 9/1951 Mackey 252/300 3,249,435 5/1966 Rogers.... 96/84 3,330,680 7/1967 Haas 96/84 2,875,053 2/1959 Minsk 96/84 3,120,564 2/1964 Milionis et a1. 252/300 3,215,530 11/1965 Riebel et a1 96/84 3,200,086 8/1965 Coleman 260/2 2,773,903 12/1956 Hardy et a1. 260/591 3,698,907 10/1972 Sato et al. 96/84 R FOREIGN PATENTS OR APPLICATIONS 1,120,122 7/1968 Great Britain 96/84 1,248,554 11/1960 France ..96/84 Primary Examiner-Ronald H. Smith Att0rneyHarry Goldsmith, Joseph G. Kolodny and Mario A. Monaco 1 1 ABSTRACT This invention relates to colour photographic material. Said material is stabilized by means of a 2- hydroxybenzophenone which is free from sulphonic acid groups and which corresponds to the formula wherein X represents a hydrogen or halogen atom, a possibly substituted alkyl, alkenyl or phenyl group, an alkylcarbonyl or alkylsulfonyl group or an A'-O group, Y represents a hydrogen or halogen atom, a possibly substituted alkyl group or an A-O group, A, A and A" each representing a hydrogen atom, a possibly substituted alkyl, alkenyl, cycloalkyl, aralkyl or phenyl group or a residue of the formula wherein D represents an alkyl, alkenyl or possibly substituted phenyl residue and n is one or two.

4 Claims, No Drawings PHOTOGRAPHIC MATERIAL STABILISED AGAINST ULTRAVIOLET RADIATION This invention relates to photographic material which contains a Z-hydroxybenzophenone derivative as an agent for stabilising the photographic material against the deleterious effects of ultra-violet radiation.

According to the present invention there is provided colour photographic material, characterised in that it contains on a carrier, in at least one layer a stabilising agent against ultra-violet radiation which is a 2- hydroxybenzophenone free from sulphonic acid groups of formula wherein X is a hydrogen or halogen atom, a possibly substituted alkyl, alkenyl or phenyl group, an alkylcarbonyl, (alkyl -CO-) or alkylsulfonyl group (alkyl-SO or an A-O group, Y is a hydrogen or halogen atom, a possibly substituted alkyl group or an A-O group, A,

A and A" each representing a hydrogen atom, a possibly substituted alkyl, alkenyl, cycloalkyl, aralkyl or phenyl group or a residue of the formula wherein D represents an alkyl or possibly substituted phenyl residue and n is one or two.

Of particular interest for the purposes of the present invention are the 2-hydroxybenzophenones of formula HO Xi wherein X, is a hydrogen or halogen atom, an alkyl, alkoxy or phenyl group, Y is a hydrogen or halogen atom, an alkyl or alkoxy group and A has the meaning specified above.

Substituent groups optionally present in X, Y, A, A, A or D are for example, alkyl, alkoxy, hydroxyl or nitro groups or halogen atoms, such as iodine, bromine or, in particular, chlorine.

Preferably the 2-hydroxybenzophenone is of the formula wherein A, represents a hydrogen atom, a possibly further substituted alkyl residue, a cycloalkyl residue or a residue of formula wherein D represents an alkyl, alkenyl, phenyl, alkylphenyl, hydroxyphenyl, alkoxyphenyl or halo-phenyl residue and n equals one or two, and X. and Y, have the specified meaning, or in particular of formula wherein X, represents a hydrogen or chlorine atom, an alkyl or alkoxy group with one to four carbon atoms or a phenyl group and A a hydrogen atom, a possibly substituted alkyl group with one to 18 carbon atoms, a cycloalkyl group with five or six ring members or a residue of formula CO (NH),,-,D

wherein D represents an alkyl residue with one to 18 carbon atoms, an alkenyl residue with two to four carbon atoms or a residue of formula Of particular advantage are 2- hydroxybenzophenones of formula a .r.r w.., w wm ,W a

where A is an alkyl residue possibly substituted with one or two carboxyl or alkoxy carbonyl groups, with one to 18 carbon atoms, the alkoxy group having one to 18 carbon atoms or being a cyclohexyl residue and X, has the meaning specified above.

Good results are obtained in particular also with 2- hydroxybenzophenones of formula wherein m and p represent integers of a value of one to 22 and a and r are each one or two, and X, has the meaning specified above.

Alkyl ethers of 2-hydroxybenzophenones correspond preferably to formula X2 @410 o-cmHMi wherein X and m have the meaning specified above. Carboxylic acids of the 2-hydroxybenzophenones correspond preferably to formula or especially formula H6 a. a X:

wherein m is an integer of a value of one to and X has the specified meaning.

Carboxylic acid esters of the 2- hydroxybenzophenones correspond preferably to formula or in particular formula wherein X m, and p have the specified meaning.

In Formulae (6), (l0) and (1 1) p represents preferably an integer of a value of one to four.

The 2-hydroxybenzophenones to be used according to the invention are known and can be manufactured according to known methods.

From French Pat. No. 1,248,554, for instance 2- hydroxybenzophenones of formula 2-hydroxy-4-(10-acetyldecaoxy)-benzophenone, 2-hydroxy-4-(10'-butyloyldecaoxy)-benzophenone, 2-hydroxy-4-( 2'-dodecanoyl-cthoxy )-benzophenonc, 2-hydroxy-4-( l0hutylthiocarbonyldccaoxy)- benzophenone, 2-hydroxy-4-(2'-dodecathiocarbonylethoxy)- benzophenone, 2-hydroxy-4-(2'-dodecathioethoxy)-benzophenone, 2-hydroxy4-(10-butylthiodecaoxy)-benzophenone, 2-hydroxy-4-(10'butylsulfinyldecaoxy)-benzophenone, 2-hydroxy-4-(10'-buty1sulfonyldecaoxy)- benzophenone,

Furthermore, in the U.S. Pat. No. 3,200,086, 2- hydroxybenzophenones of formula (13) 'Rl H0 R.@ O0 @0 cmmm are described, wherein R represents a hydrogen atom or a hydroxyl group and R a hydrogen atom or a carboxymethoxygroup, as stabiliscrs against ultra-violet radiation, chemically bonded in polymcrisations.

In the U.S. Pat. No. 2,773,903, 2- hydroxybenzophenones such as for instance 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2-dihydroxy-4-methoxy-4'-ethoxybenzophenone, 2,2'-dihydroxy-4-butoxy-4'-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-ethoxybenzophenone, 2-hydroxy-4'-methoxy-4-chlorobenzophenone, 2-hydroxy-4-methoxy-benzophenone and 2-hydroxy-4-methoxy-4-methylbenzophenone are described as ultra-violet absorbers in plastics.

Other light protective agents against ultra-violet radiation, such as for instance 2,4-dihydroxy-4'- phenolbenzophenone or 2-hydroxy-4-methoxy-4-phenyl-benzophenone are known from the German Pat. No. 1,093,373.

2-hydroxy-4-methoxybenzophenone and 2,2- dihydroxy-4-methoxybenzophenone are described in the German Pat. No. 1,093,374 as stabilisers for synthetic resins against the effect of ultra-violet radiation.

As light protective agent in synthetic resins, especially in unsaturated polyesters, the French Pat. No. 1,098,344 mentions benzophenones of the general formula R5 OH wherein R is an alkyl group with one to four carbon atoms, R4 an alkyl group with one to four carbon atoms, a hydrogen or halogen atom, and R is an alkyl or alkoxy group with one to four carbon atoms, a hydrogen or halogen atom. To this belong amongst others the 2-hydroxy-4,4,5'-trimethoxybenzophenone, the 2-hydroxy-4-n-butoxybenzophenone, the 2-hydroxy-4- 5 methoxy-4-tert.butylbenzophenone, the 2-hydroxy-4- ethoxy-4-propylbenzophenone and the 2-hydroxy-4- methoxy-2-ch1orobenzophenone.

The French Pat. No. l,256,l 12 describes the 2- hydroxy-4-carboxymethoxybenzophenone and the 2- hydroxy-4-carboxymethoxy-4'-methoxybenzophenone as initial product for the manufacture of stabilisers in plastics by conversion with multivalent alcohols.

Other Z-hydroxybenzophenones to be used according to the invention are, for instance, the 2-hydroxy-4-carboxymethoxy-4'- phenylbenzophenone, 2-hydroxy-4-carboxy-n-decoxy-4'- phenylbenzophenone, 2-hydroxy-4-carboxy-n-pentoxy-4'- phenylbenzophenone, 2-hydroxy-4-ethoxy-carbonyl-n-decoxy-4'- phenylbenzophenone, 2-hydroxy-4-ethoxy-carbonyl-n-pentoxy-4'- phenylbenzophenone, 2-hydroxy-4-l2 ,3 '-di-(ethoxy-carbonyl)-propoxy/- 4-phenyl-benzophenone.

The German Pat. No. 1,468,202 described so-called p-terphenylketones as protective agents against ultraviolet radiation. Other 2-hydroxybenzophenones which can be used according to the invention correspond, for instance, to the following formulae:

7 H 7 ,7 V o o-Qo-c OCH=CH2 HO -c QQO-Q OCH=CHCH:

@43 0O(CH1)1CH:

H0 ClOH=CH-C 000 came OOH no o 0 0 (cm) "on:

(lbn) I p) HO (l5q) CHaO Q4: o-Q-o cumooo can I CH3O Q4: o-Qocmoucmcoon OOH Compounds of this type, which are in accordance with the general formula (16) 7 HO I W V v:

wherein x is an integer of a value from one to 18, y equals one or two and R a hydrogen atom, a cycloalkyl, alkenyl, possibly substituted alkyl or possibly substituted phenyl residue, can be made according to the known methods, for instance by conversion of the corresponding 2,4-di-hydroxybenzophenone with the corresponding alcohol. By re-esterification of esters, (17) 110 which do not correspond to formula (16) or esterification of free acids according to formula (16) esters of Formula (16) are also obtained.

TABLE 1 Absorption maximum Melting in dimethyl point formamide Formula number X3 31 2 A4 in C. in /nm./

101 H H (011510113 2g +325 C 0 H3) 3 3004-326 (0 Hz) 5C H3 89 29s+332 ((JIlzhCHa 67 29l+330 ((lllg)n(lllri 82 1495-1-33!) ((lllzhsclla 88 2913-5-32!) ((JIlUmUOOll 2lJ2+324 203 H "a II CHzCOOH 204 300+330 H H (CHz)5COOH 124 298+326 CHzC 0 OH 248 241+336 H 2954-325 H 162 297 +325 H 163 300+328 H 152 297+326 H 202 297-1-330 H 201 290-1-336 H 186 297+328 H 158 296+325 172 293+325 CHz- N O 1 (CH2) 1 CH3 Liquid 294+326 (C H2) 1 CH: 55 298-1-330 (0 Hz): CH: 60 295+325 (CH2) CH3 51 296+325 CH(CH CH CHa)z Liquid 298 +330 (illflllL CIL-Ullz; I17 2JlH-330 ((Jllzhflll I45 2ll i+33ll 125 5 t v a l t .110.-. H 163 2ll8+335 N1'Ig NHCO- -COOCI-Is 1. T .-C 0 CH H H 184 281+286 1.) 4 H 123 BOO-[ 330 301 V t H v. H H2)10COOC2H5 54 292+3g 302 H (CH2)sCOOC;-H.s 69 29 4.33

303 Same as above H (CH2)IOCOOC2H5 g 296+335 304 4'OCH2COOC:H5. 2-OH CHzCOOCzH5 13g 2g7+3 305 4 Q H (C 2)a O CH2 2 s Liquid 297-1-330 306 Same a ab ve H CHzCH CH C O O C 11 77 2g5+33 1155s 1 Cdritinued Absorption maximum Melting in diniothyl point formmnido. Formula number X3 2 A1 in (I. in /1ll]l./

CllzCOOCg] lr. 133 2ll7+330 (/II2()()()((JHZ)17C]]I1 U5 21J5+32h (:1I2(:()()((JII2)21()1I3 E1!) 295-1-330 CllzCOOCHzCIIzOIl 17!) 2U6+330 (JH CO0 CH2CH2OC2H5 1J2 300+325 CHzCOOCHzCHzCl 174 293+328 CI-IzCOO(CHz)sC1 162 295+330 79 296+329 CHZC 0 O- H 114 296-1-330 315 .d0 H CHzCOOCHzCH=CH-CH3 31b do H CHzCOOCHzCI-IzOOCTHg 183 297+330 167 296+325 011200 0-- -CIIa 1G6 295-l-330 CIIZCOO 0 C113 198 296+325 01120 O 0- -Cl OC-CH; 108 298+329 OCNH-C2H5 159 298+325 CH C00(CH2)5CH2 92 297+330 DMF plus H 0;1:1.

The material for colour photography, which accord- 1.3. Deposited on the binding agent.

ing to the invention is stabilised against the effect of ul- 35 1.4. Co-polymerized with the binding agent or a detra-violet radiation can be treated when partially or torivative thereof. tally unexposed or exposed. Preferably unexposed, or 1.5. Reactively inter-linked with the binding agent or exposed and fixed, material for colour photography is inoculated as preliminary polymerisate on the stabilised against ultra-violet radiation. For this puremulsion forming polymer. pose it may be material for processing by colour trans- 1.6. Dispersed in fine distribution in the binding fer methods or preferably, material for processing by agent. For this purpose the usual dispersing methchromogenic and silver dye-bleaching methods, or mau as Controlled precipitation fr m a liquid te -i3] already processed by said methods 0] dissolved consistency, grinding Ol' emulsification The compounds to be used in accordance with the Of a component Solution in a liquid miscible invention, or mixtures thereof, may be incorporated in with the binding agent or the binding agent Solution some form either into emulsions containing the dyeand Subsequent removal by a washing pstuff or dyestuff components, or into coloured or cooration p f' y be used- For h P P the lourless intermediate backing and/or covering cmul- Known fl the P P of p sions containing possibly other components. slohs f pp v Such as f)r lhstahce the P of The compounds to be used in accordance with the f P agent use ofpmtecnve Colloids, p invention can be incorporated into or applied on to the mg f 9 m f and photographic material during the manufacture of the Emulslfied l h bmdmg agent m finely material, for instance by including in the required form P' emulsion or before, during or after the photographic lncorporauon an f a Substrate processing, for instance for applying the compound per gously to l.l. to 1.7., which 18 subsequently dlS: se, applying it with the aid of bonding agent, for inm the P f f m m i polymer" Stance by Spraying it with a protective varnish or by sed, or reactively inter-linked with it. The followdiffusing it from a solution, suspension or emulsion. mg for m stance' sultable sfbstrfitesi 'f uble polymerisates on an acrylic acid and vmylpyr- The followmg methods of "lcorporatmg the rolidone basis, polyvinyl alcohols, gelatin deriva- Pounds of formula (1) are Posslble: tives, e.g., by reactive interlinking with triazine de- 1. Incorporation into the emulsion binding agent, for rivatives, modified gelatin, starch, polyamides, instance in gelatin or other usual emulsion binding polyacrylonitrile solvents of low volatility, such as agents, such as photographic varnishes which may esters of dicarbonic acid, diethyl lauric amide, triconsist for instance of ethyl or acetyl cellulose. 1.1. Molecular dispersed solution in binding agent. 1.2. In form of associates distributed in the binding agent.

cresylphosphate and the like.

3. Incorporation into the layer-substances for instance cellulose triacetate, polyester, polycarbonate, preferably in molecularly dispersed solutions.

The compounds, according to the invention, are outstanding for suitable spectral absorption, good diffusion, the property high light fastness, excellent protective action against ultra-violet radiation, suitable rheological properties in mixtures with gelatin and especially by excellent solubility in water [compounds of formula (9) or in dibutylphthalate [compounds of formulae (7) and (11) Compounds especially solubie in dibutylphthalate are listed in the following Table 11.

TABLE 11 Formula No. Solubility in dibutylphthalatc according to in percents by weight Table I (g 100 g of mixture) The following Examples will serve to illustrate the invention.

EXAMPLE 1 90 g of the compound of formula (105) are dissolved over a water bath in l 10 g of dibutylphthalate. This solution is subsequently dispersed and thinned in a mixture of 200 g of an aqueous eight per cent solution of sodium alkyl naphthalene sulphonate and 1,600 g of a 12.5 percent gelatin solution in a colloidal mill.

Subsequently, the dispersion is poured on to a transparent cellulose triacetate strip in such a manner that after drying the film thus prepared has an optical density of 1.5 for light at 350 nm wavelength.

The strip is then treated with a commercially available p-methylaminophenyl-sulphate-hydroquinone developer for 6 minutes. Subsequently, it is immersed for 4 minutes in a stop fixing bath of the following composition:

Ammonium thiosulphate 200 g Sodium sulphite 15 g Sodium acetate-trihydrate 25 g Glacial acetic acid l3 g Water to make up 1,000 ml.

After washing for 2 minutes the strip is treated for 6 minutes with a solution of the following composition:

Hydrochloric acid, 37 percent 70 ml.

Potassium bromide -50 g Thiourea 80 g 2-amino-3-hydroxyphenazine g Water to make up 1,000 ml.

Subsequently, the strip is washed for 2 minutes and then immersed into a silver bleaching bath of the following composition:

Potassium-iron(lll)-cyanide 75 g Calcium bromide 15 g Primary sodium phosphate-monohydrate 10 g Sodium acetate-trihydrate -5 g Glacial acetic acid 10 g Water -to make up 1,000 ml.

After 2 minutes the strip is washed for 2 minutes and again treated for 4 minutes with the above-described stop fixing bath. Subsequently, the strip is washed and dried. After the above-described photographic processing, the optical density of the strip is unchanged at 1.5 for light of 350 nm wavelength.

Similar results are obtained when using one of the compounds of formulae (101), (103), (104), (106), (107), (116) to (126), (129) or (301) to (323) as listed in Table 1.

EXAMPLE 2 3.3 ml of a 6 percent aqueous gelatin solution, 2.0 ml 1 percent aqueous solution of hardener of formula:

and 2.0 ml 1 percent solution of the product of formula (202) are added with a pipette to a mixture of ethanol and 30 percent caustic soda solution in a test tube and supplemented with deionized water to 10.0 ml. This solution is thoroughly mixed and kept at 40 C for 5 minutes on a water bath.

The casting solution at 40 C is poured on to a 13 cm x 18 cm substrated glass plate. After setting at 10 C the plate is dried in a drying cabinet at ambient atmosphere of 32 C. The optical density of the filter thus produced is 1.0 for light of 350 nm wavelength.

After processing according to Example 1 the optical density remains unchanged.

Instead of the compound of formula (202) one of the compounds of formula (20] or (203) to (205) according to the invention can be used.

EXAMPLE 3 0.1 g of the compound of formula (102) is dissolved whilst heating in 10 ml of ethanol, adjusted alkaline with ln-sodium hydroxide solution and diluted with water to 20 ml.

1 ml of this solution is mixed, using an ultrasonic equipment, with 6.6 ml 6 percent gelatin solution, adjusted to pH 9.4. After adding 3.4 ml of ethanol and 1.0 ml of a 1 percent aqueous solution of the hardener of formula (401 the pH value is adjusted to 5.5 with 1nhydrochloric acid. The mixture is then poured, as described in Example 2, on to a 13 cm X 18 cm substrated glass plate and dried. An optical density of 1.0 for light at 350 nm wavelength is obtained which, when the plate is treated according to Example 1, remains unchanged.

Instead of the compound of formula 102) one of the compounds offormulae 108) to (1 l5), 127) or 128) of Table 1, according to the invention, can be used.

EXAMPLE 4 9 mg of the compound of formula (117) are mixed in the ultrasonic equipment with 6.6 ml of 6 percent aqueous gelatin solution. 1.0 ml of a 1 percent aqueous solution of hardener of formula (401) is added and supplemented with deionized water to 10.0 ml.

The mixture is then poured as specified in Example 2 on to a 13 cm X 18 cm substrated glass plate and dried. An optical density of 1.0 for light of 350 nm 13 14 wavelength is obtained, which when the plate is treated and on a carrier in such a manner that the protective according to Example 1 remains unchanged. layer at 350 nm has an optical density of 1.0. In the Instead of the compound of formula (1 17) one of the case of the ClBA photographic varnish, this correcompounds of formulae (121) or (305) according to sponds to a layer thickness of approximately 20 [.L.

the invention can be used. 5 After 150 hours exposure with a xenon lamp there results a protective effect of 53 percent, calculated ac- EXAM-PLE 5 cording to Example 5, compared with a varnish layer A red sensitive silver bromide emulsion, containing not containg any stabilizer. the blue-green dyestuff of formula: Similar results are obtained when using one of the is cast on to a transparent carrier. other compounds listed in Table I of formula (101), Strips of the light sensitive material thus produced, (103), (104), (106), (107), (116) to (126), (129) or are cut and a layer is applied to them using a dispersion (301) to (323).

as described in Examples 1 to 4. On to one strip, serving as reference specimen, a gelatin solution only is ap- EXAMPLE 7 plied. A gelatin layer on carrier and containing the dyestuff After the photographic processing described in Exof formula (402) in a maximum density of 1.00 is imample 1, all the strips have the same colour density mersed into an 0.3 percent aqueous solution of commeasured with red light. pound (201 until the optical density of the stabilizer The strips are then exposed for 150 hours to a xenon diffused into the gelatin is 1.00 at 350 nm. lamp. A comparison of the optical density prior and After drying, exposure follows with a xenon lamp for subsequent to this exposure provides a parameter for 150 hours. The protective effect, calculated according the improvement of the light fastness due to the applied to Example 5, is 40 percent compared to a specimen protective coat. The results are listed in Table 111. without stabilizer.

Instead of the compounds listed in Table 111, it is pos- A similar result is obtained with the compound, acsible also to use one of the compounds listed in Table cording to formula (204) of Table l. EXAMPLE 8 Similar results are obtained when also using other dyestuffs usual in silver dye-bleaching, colour transfer 40 Ektachrome daylight transparent material, partially or chromogenic photography. exposed with white light and developed in the usual TABLE III Protective layer With compound of D of the dye-stuff D,,,,, of the dye-stuff D,,,,,,. (reduction of Improvement of light fastness in according to Formula No. prior to exposure afterexposure D,,,,,,.) in l- (AD,,,,,,%/4R%) Example No.

1 101 1,00 0,85 0 1s 69 l 105 1,00 0,75 25 48 l 121 1,00 0,88 12 1 302 1,00 v 0,89 11 77 2 201 1,00 0,73 27 44 2 202 1,00 0.72 28 42 2 204 1,00 0,93 7 3 102 1,00 0,78 22 54 4 l 17 1,00 0,87 13 73 Reference specimen (gelatin without stabilizer) EXAMPLE 6 manner, is provided with a protective coat containing the compound of formula (202) (test specimen). A

g of the compound of formula are dissolved similar compounded specimen containing the comin Ofa commercially used P g p Varnish, 65 pound of formula (202), but not containing the specifor instance, ClBA photovarnish". This mixture is apmen, is used for comparison, (zero specimen). Subseplied on to a gelatin layer containing the dyestuff of forquently, the two specimens are irradiated for 48 hours mula (402) in a maximum density of 1.00, hardened with a xenon lamp. Prior and subsequent to irradiation the filter densities are measured for red, green and blue light (R, G and B) with a GRETAG D 33 densitometer. The results are compiled in Table IV.

1. A light sensitive color photographic silver dye bleach material which comprises on a carrier in at least one layer, as a stabilizing agent against the effects of ultraviolet radiation, a 2-hydroxybenzophenone selected from the group consisting of on @4: oQmcnmcoon.

2. Material according to claim 1, wherein the 2- hydroxy-benzophenone is 3. Material according to claim 1, wherein the 2- hydroxy-benzophenone is 4. Material according to claim 1, wherein the 2- hydroxy-benzophenone is Q-coQownmcoon. 

2. Material according to claim 1, wherein the 2-hydroxy-benzophenone is
 3. Material according to claim 1, wherein the 2-hydroxy-benzophenone is
 4. Material according to claim 1, wherein the 2-hydroxy-benzophenone is 